60 minutes is an hour , you haven't given out what the 15, 30 and 60 are , and the 1 , 2 and 4 are(minutes or hours?)
Answer:
x= -1/5
Let me know if you need an explanation :)
3 cm because the radius is 1.5 cm and the diameter is the radius times 2
30 is the value of the 3 in 6035